MLS GG 25,50,100,200/1, CAT III 4mm Measuring Leads. Hirschmann Test and Measurement MLS GG, 4mm CAT III measuring leads have a 4mm diameter safety connector with a straight outlet each end and feature a 1mm² multi-stranded cable. These MLS GG type measuring and test leads have a nickel plated copper beryllium contact spring, highly flexible,double insulated stranded lead and a shatter-proof sleeve, and are available in various lengths and colours. The test lead cable has a built in colour indicator for easy identification of insulation damage by means of a different coloured inner core of insulation. Features and Benefits: ; Rated voltage 1000 VAC/DC ; Rated current 32A ; CAT III ; PVC Insulated ; Contact resistance 12 m